1. Disgusting anti-war groupthink of sniffy left wingers, contending that there were no good reasons for supporting an insane, half-arsed, ill-defined and transparently doomed militaristic clusterfuck led by morons with support from the undead cast of Iran/Contra: The Musical.
2. The dogmatic certainty that a war that resulted in horrifyingly brutal civil strife and mass slaughter, sectarian partition, the rocket-propelled national decline of the invaders, the invaded nation and all of their allies in the region, plus the vast empowerment of reactionaries and lunatics, was somehow a bad idea.
By hewing to the bien-pensant party line, liberals on the internet have perpetrated possibly the most tragic injustice of the 21st century in implying that an elderly academic's opinions are cretinous, deluded and cracked, leaving him feeling somewhat slighted.
Source: "Why can't those who opposed the war admit that I cheerled this easily-avoidable, murderous catastrophe in good faith?", Normblog: Extract from page 388, Chapter Seven, Book Nine of the Professor's thirty two-volume epic poem "Just Because It Was a Disaster Doesn't Mean I Was Wrong, You Snotty Liberal Bastards".